DD, 2.6 has always been a great sleeper, really good. Until just over 2 weeks ago when she started nursery (every day for a few hours - she seems to love it from what she and staff say). Since then, it has taken around 2 hours every night for her to fall asleep. Yesterday, I got so fed up of having to put her back to bed for the xth time(she literally gets up again the second I leave her room) I locked her door. This upsets her and I feel bad about it but I´m just fed up of the whole situation. PLEASE what can I do and if this is linked to starting nursery, how long will it take her to settle. She´s only getting around 10 hours sleep a day at the moment.